ignition coilof morris minor 1000 car-1957 -is heating

[Sandun]

The ignition coil of my morris minor 1000 car is very heating and stop car (coil is New)- Pleas tell my why the coil heat

[kennatt]

go on bm tell him

[bmcecosse]

Welcome to the forum. Why did you fit a new coil to the engine ? You say this new coil is 'heating' - so at least we know it is passing current. Are you sure it is the correct coil for the system on the car ? It should have an impedance of ~ 3.2 ohms between the two terminals (all wires disconnected). Many new coils these days are sold for the later Mini (and others) where there is a running resistance in the feed to the coil (so called 'ballast' system) and so these coils have much lower resistance as they are running on somewhere between 6 and 9 volts. If you run such a coil on 12 volts (actually 14 volts when the dynamo is charging) - then it gives great sparks for a while, and overheats badly - and of course - it fails after a short time.........
There is also the ongoing problem that coils supplied these days don't seem to have the same quality as the originals..... it's always better to use a good old coil - they very rarely fail unless mal-treated in some way.
Can you measure the coil impedance? Can you try the old coil back on the system? It's also worth doing a general overhaul of the ignition system - fitting a new set of points and condenser (and perhaps the little 'low volts' wire) can only help, but gain try to get good quality parts and not 'repro' parts.